19982765 has 16 divisors (see below), whose sum is σ = 26251776. Its totient is φ = 14481600.

The previous prime is 19982759. The next prime is 19982771. The reversal of 19982765 is 56728991.

It is an interprime number because it is at equal distance from previous prime (19982759) and next prime (19982771).

It is not a de Polignac number, because 19982765 - 2¹⁸ = 19720621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22724 + ... + 23586.

It is an arithmetic number, because the mean of its divisors is an integer number (1640736).

Almost surely, 2^19982765 is an apocalyptic number.

It is an amenable number.

19982765 is a deficient number, since it is larger than the sum of its proper divisors (6269011).

19982765 is a wasteful number, since it uses less digits than its factorization.

19982765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300.

The product of its digits is 272160, while the sum is 47.

The square root of 19982765 is about 4470.2086081077. The cubic root of 19982765 is about 271.3637676054.

The spelling of 19982765 in words is "nineteen million, nine hundred eighty-two thousand, seven hundred sixty-five".